Union-head machine.



H. 0. EVANS.

UNION HEAD MACHINE.

APPLICATION FILED Nov. 5.1910.

Patented Aug.` 19, 1913.

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UNION HEAD MACHINE.

APPLICATION FILED Nov. 5, 1910.

L'YQO, Patented Aug. 19, 1913.

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H. 0. EVANS.

UNION HEAD MACHINE.

APPLIUATION FILED 110115, 1910.

1,070,590. 'Patented Aug. 19, 1913.

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UNION HEAD MACHINE.

APPLIGATION'PILBD Nov. 5,*1910.

Patented Aug. 19, 1913.

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HENRY O. EVANS, OF PHILADELPHIA, PENNSYLVANIA.

UN ION-HEAD MACHINE.

Speccaton of Letters Patent.

Patented Anguita 1913.

Application filed November 5, 1910. Serial No. 590,886.

To all whom t may concern:

Be it known that I, HENRY O. EVANS, a citizen of the United States, residing in the city and county of Philadelphia, State of Pennsylvania, have invented a new and useful Union-Head Machine, of which the following is a specification.

This invention relates to a machine for forming union heads and has for an object to provide a machine wherein the reaming and facing operation takes place simultaneously with the threading` operation, whereby the two operations are combined to effect, in a single step, a complete union head.

In union head machines as heretofore constructed, the operation of reaming and facing is a separate and distinct one, performed usually on a separate machine from that cutting the threads or else the same has been done on the same machine by operating the reaming spindle by hand as a separate step or by t-he use of a turret, either of which means consumes twice the time of a single operation.

In my present invention I have combined with the positive feed reversing mechanism, a second operating mechanism connected to operate the roaming and facing tool and operated by the same reversing` mechanism, whereby both operations take place simultaneously and only one machine is employed.

It further consists of other novel features of construction, all as will be hereinafter fully set forth.

For the purpose of illustrating my invention I have shown in the accompanying drawing one form thereof which is at present preferred by me, since the same has been found in practice to give satisfactory and reliable results, although it is to be understood that the various instrumentalities of which my invention consists can be variously arranged and organized and that my invention is not limited to the precise arrangement and organization of these instrumentalities as herein shown and described.

Figure 1 represents a plan of a machine embodying my invention, certain parts being shown in section, for. clearness. Fig. 2 represents a section on line w-, Fig. 1. Fig. 3 represents a detail of the chuck mechanism. Fig. 4 represents a section on line g/-f/, Fig. 1. Fig. 5 represents a vertical section of a reversing mechanism used in connection with my novel machine.

Similar numerals of reference indicate corresponding parts in the figures.

Referring to the drawings: l designates the bed of a union head machine, the same having suitably mounted therein a gear V2, driven from any suitable source of power and forming the main driving means of the machine. This gear 2 meshes with a plurality of bevel gears 3, 4 and 5, each of which has preferably formed integral therewith a sleeve, respectively designated by the numerals 6, 7 and 8, it of course being understood that suitable bea-ring supports 9 are mounted on the bed plate to support the same in operative position.

10 designates a spindle slidingly mounted within the sleeve 6 and secured for rotation therewith by means of a key 11, said spindle forming a holder for a suitable tap adapted to internally thread the union head. In order to advance the spindle 10 to bring the tool into Contact with the work, a leader nut 12 is lixedly secured by means of a nut 1? or the like to a reduced portion 14 of the spindle, the said leader nut 12 having an eX- ternal thread 15 meshing with the thread 1G of a bushing 17 fixedly secured to the bearing 9. It will thus be apparent that a rotation of the sleeve 6 will cause the spindle 10 to rotate also and thus transmit movement to the leader nut, which feeds in the bushing 17, according to the direction in which the spindle 10 is rotated.

18 designates a hollow spindle secured by a key 19 to the sleeve 8 and forming a holder for a suitable die 20, which latter coperates with the union head to form the eX- ternal thread thereon. It will be noted in the present instance that the die 2O is detachably secured to the spindle 1S through the medium of a bushing member 20X, preferably held in position by a dovetailed connection, as will be apparent. This spindle 18 is reciprocated in a manner similar to the operation of the spindle 10 by means of a similar leader nut 12 and bushing 17, it being noted thatin this instance a collar 21 is screw-threaded upon the spindle 18 and abuts the leader nut 12 to transmit the movement 0f the latter to the said spindle 18. A lock nut 22 is employed to maintain the parts in operative position.

23 designates a spindle forming a holder for a suitable reaming and facing tool, the

said spindle being secured by a key 24 to This spindle 23 has a threaded portion 25,.

having mounted'thereon a collar 26 forming av connectipn with the reciprocatingmeans' for the said spindle 23. ln the present instance this reciprocating means consists of 'a disk 27 keyed to a suitable shaft 29, which is suitably mounted for rotation in tlie'frame of themachine, the said shaft 29 having a gear 30 thereon meshing With a. Worm 3l ixedly secured uponthesleeve.7fornj1ing a part ofthe bevel gear 4.

32 designates a cam fixedly. securedto the face ofthe disk 27, the said c'am having an externalface 33'and an internalface 3'4and terminatingv at al point determined by the length of feed'desired' for the spindle ,Pivotally mountedatV one endofthe cam is a pawl 35 normally heldin operative position by means of a spring 36 .and serving to guide the cam rollerV 37 to the external face 33 after a reversing operation. This cam roller 37 is rotatably mountedupon a bell crank lever 38 pivoted` at 39' toa suitable portion of thebed l, the opposite end ofthe saidl bell crank having secured thereto a forked arm 40 cooperating With a nut 41 mounted upon a pin42 secured'to the collar 26. It will thus be apparent thatlas-the disk 27 rotates, the camface 33 Willmove the roller 37 so as to cause aqswinging of the bell crank arm 38 and thus move the spindle 23 in one direction, While duringthe reverse, movement in the other` direction is caused, in the present instance,by means of a spring 43. suitably mounted upon a rod 44'iXed to the bed l' and held in place by means of an adjusting nut 45. One end of the spring 43, as Will be apparent, abutsA a lug 46, preferably formed integralwvith the bell crank 3S, so as to affect the movement desired.

47 designates la plate slidably mounted'on the. bed 1, movement of which isl controlled by threaded spindle 48, the said plateforming a chuck to receive the head to he. operated upon. A suitable. stop 49 is mountedY in the guide frame 50 of the platef47 and serves to limit the movement of the same and insuring the proper alinement. of the union head With the lmittingtool's;

51 designates-the frame ofthe union head machine adapted to receive power from Vthe main driving shaft 52, which carries a.bev eled gear 53 meshing with a similar gear 5.4, keyed to the operating shaft 55 offthe ref versing mechanism. n

56 and 57 designate respectively,.beveled gea-rssuitably mounted for rotation on the operating shaft 55 and'having, clutch faces 58 and 59 carried4 thereby.. T :hegear 56in the present instance, meshes With a gear 60 andlthegear 57 Witlia gear. 61both-gears beingY mounted on the driving shaft 62 Whichi carriesthe'. drivingV gear 2 of the ing the reversing operation, it of course being apparent that the arrangement of the gears 56 and 57 is such asto cause the sha-ft 62l to rotate in opposite; directions. The

shaft 55 is provided* for aportion ofA its length WithV a bore 63 through Which a rod 64 passes, carrying a piny 65.- The latteryis here shown passing through a slot 66 inv the shaft 55` and joined'tothe clutch sleeve 67', it'offcourse being understood that` this sleeve is provided with suitable clutch faces 68 and 69. for coperation' With the respective clutch faces 8 and`9.. It will thus be apparent thatl byshifting therodv 6'4in one direction or the other, either automatically or manually, the clutch sleeve 17 Willi be moved to engage one or the other ofthe clutch faces 58" andv 59 and thus rotate the sh'aft 62. in one direction or theV other..

For the purpose offthis application it is not thought necessary tov go into a detailed description ofthe rodl shifting mechanism, since the sameiis fully shown and described in applicants Patent No. 1,004,862 of Octoher 3rd, 1911.' Y

Inthe operation of the machine, a union head casting is properly positioned andadjusted in the chuck member 47V and-the machine started'in operation,- it of* coursebeingunderstoodthat a suitable die, tap and reamer are fixed'on their respective holders. The movement of the machine produces a simultaneous forvvardfeedingof the spindle 10 4andthe spindle 1S, .so lthat both an external and an internal thread are; cutuponfthe cast-ing, While atthe-same time rotationof the. disk27fcauses. the cam 32'to enga-ge its roller 37 This movement of thev cam .causes the roller. to rideA up over the pawl 3.5 to the external face 33 of the camendthusrock the lever 3.8 to bring the. spindle2'3' With: its reaming, and facingtool, into. engagement With the. casting. The machine. is settore.- verse at thev proper. time, thatv is when the threadingA operation is completed. andthe actionis automatic, andgthe. reverse-move.- ment is transmitted: alsoto thedisk27. It Willhere be noted'that the cam 32lis so designed as to advancethereamer an accurate distance. into the, union .head and then aportion ofthe-cam isv reached, Which brings the lever 38 to rest, thereby. allowing the` reaming tool toV perform a. facing operation be.- fore the parts are returnedito normal posi tion. As soon as the reverse position. is reached, the: roller 3.7 (drops past the end-of the cam 32 into engagement with the inside face 34 thereof, whereupon the spring 43 snaps the lever 88 back to its initial position, thus quickly withdrawing' the reaming tool, while the further rotation of the disk 27 in the reverse direction forces the roller 37, past the spring pressed pawl 35, into position for another operative movement.

It will now be apparent that I have devised a new and novel combination mechanism for performing' a variety of steps in the operation of forming' a union head in one step, whereby a union head is quickly and accurately machined. It will furthermore be apparent that the mechanism is a complete, unitary one adapted for application and operation with any quick return reverse movement and operating' eiiectually and eiiiciently for the purpose intended.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent, is:

l. In a machine for forming' union heads, a chuck adapted to support a union head blank, a spindle rotatably mounted on each side of said chuck and adapted for move ment in either direction, one of said spindles carrying' a threading' die and the other a tap, a reciprocable spindle carried by said die spindle and carrying a reaming' and facing tool, means for reciprocating said facing tool spindle, and means to rotate said spindles in either direction.

2. In a machine for forming' union heads, a chuck adapted to support a union head blank, a spindle rotatably mounted on each side of said chuck and adapted for movement in either direction, one of said spindles carrying` a threading die and the other a tap, a reciprocable spindle carried by said die spindle and carrying' a reaming and facing tool, means for reciprocating said facing' tool spindle, and a quick return mechanism connected to said facing;- tool spindle.

HENRY O. EVANS.

Witnesses ROBERT M. BARR, C. D. MCVAY.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, I). C. 

